Role of Nb on the phase stability and morphology of Ti–Ni–Cu–Nb alloys

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dc.creatorJéssica Dornelas Silva
dc.creatorGisele Fernandes Chaves Macieira
dc.creatorDilson Silva Dos Santos
dc.creatorLeandro de Arruda Santos
dc.creatorVicente Tadeu Lopes Buono
dc.date.accessioned2023-11-09T21:36:02Z
dc.date.accessioned2025-09-08T23:35:48Z
dc.date.available2023-11-09T21:36:02Z
dc.date.issued2022
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.description.sponsorshipCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
dc.format.mimetypepdf
dc.identifier.doihttps://doi.org/10.1016/j.jmrt.2022.07.146
dc.identifier.issn2238-7854
dc.identifier.urihttps://hdl.handle.net/1843/60734
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofJournal of Materials Research and Technology
dc.rightsAcesso Aberto
dc.subjectTermodinâmica
dc.subjectEngenharia metalúrgica
dc.subject.otherMicrostructural characterization
dc.subject.otherShape memory alloys
dc.subject.otherTiNiCu-based alloys
dc.subject.otherThermodynamic simulations
dc.titleRole of Nb on the phase stability and morphology of Ti–Ni–Cu–Nb alloys
dc.typeArtigo de periódico
local.citation.epage1436
local.citation.spage1428
local.citation.volume20
local.description.resumoTi52-xNi38Cu10Nbx alloys with Nb additions of x = 4, 6, and 10 at.% were produced through arc melting. The phase constitution and morphology were evaluated through X-ray diffraction, microstructural analyses (scanning electron microscopy/energy-dispersive X-ray spectroscopy), and thermodynamic calculations (ThermoCalc). The as-cast alloys exhibited a TiNi matrix, β-Nb/TiNi eutectic, and Ti2Ni precipitates. Under equilibrium conditions, TiNi and a small fraction of β-Nb were expected. Increasing the Nb content resulted in a higher β-Nb volume fraction, development of different morphologies for Ti2Ni precipitates, and formation of Ti particles. The Scheil calculator and virtual composition of the liquid were used to simulate the effect of chemical segregation during solidification. We demonstrated that the metastable phases formed during solidification and the Nb content played a vital role in the solidification sequence, phase distribution, and morphology of the alloy.
local.identifier.orcidhttps://orcid.org/0000-0002-0574-5218
local.publisher.countryBrasil
local.publisher.departmentENG - DEPARTAMENTO DE ENGENHARIA METALÚRGICA
local.publisher.departmentENGENHARIA - ESCOLA DE ENGENHARIA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S2238785422012066?via%3Dihub

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